Fwknop implements an authorization scheme known as Single Packet Authorization\\ (SPA) for Linux systems running iptables. This mechanism requires only a\\ single encrypted and non-replayed packet to communicate various pieces of\\ information including desired access through an iptables policy. The main\\ application of this program is to use iptables in a default-drop stance to\\ protect services such as SSH with an additional layer of security in order to\\ make the exploitation of vulnerabilities (both 0-day and unpatched code) much\\ more difficult.\\ This package contains the fwknop daemon.\\ \\
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